I have been anxiously awaiting news on the 2019 CX-9 and searching every day. Mazda Canada's website indicates that the 2019 CX-9 will launch this summer with CarPlay https://www.mazda.ca/en/inside-mazda/ny-auto-show/
I've also found a couple dealers with 2019 listed as "new arrival" or "coming soon" and the vin listed checks out as a 2019 so hopefully we will know soon. https://www.groovemazda.com/new-Denver-2019-+-Mazda+CX+9-Signature-JM3TCBEY4K0303176
I'm hoping for the additions of: 360 Camera, digital instrument panel, and the ventilated seats.
I hope this also applies to the US, 2-3 weeks wait to see LOL.